/Engine/Plugins/FX/Niagara/Source/NiagaraEditor/Public/ViewModels/NiagaraSystemViewModel.h
Resets the system instance to initial conditions. Optionally resets system simulation time. Optionally resets all systems that share its emitters. Optionally reinitializes the system to pull in changes.
void ResetSystem ( [ETimeResetMode](API\Plugins\NiagaraEditor\ViewModels\FNiagaraSystemViewModel\ETimeResetMode) TimeResetMode, [EMultiResetMode](API\Plugins\NiagaraEditor\ViewModels\FNiagaraSystemViewModel\EMultiResetMode) MultiResetMode, [EReinitMode](API\Plugins\NiagaraEditor\ViewModels\FNiagaraSystemViewModel\EReinitMode) ReinitMode )